Gaarden



C. REGEN BOGEN AND H. TECHEL.

SUBMARINE BOAT.

APPLICATION FILED APB.26.1915. RENEWED AUG. 17.191?- w :ilailil UNITED STATES ATENT OFFICE; I

CONRAD REGENIBOG-EN, OF KIEL-GAABDEN, AND HANS TECHEL, OF KIEL, GERMANY,

ASSIGNORS TO FRIED. KRUPP AKTIENGESELLSCHAFT GERMANIAWERFT, OF KIEL- GAABDEN, GERMANY.

SUBMARINE BOAT.

Specification of Letters Patent. Pgjfeht d pl 27 1919 Application filed April 26, 1915, Serial No. 24,053. .Reiiewed August 17, 1917. Serial No. 186,826.

'10 aZZ whom it may concern V v Be it known that we, CONRAD RncnNBo- GEN and HANS TECHEL, citizens of the German Empire, residing atKiel-Gaarden, Germany, and Kiel, Germany, have invented certain new and useful Improvements in A is the pressure proof inner vessel, B the thin walled outer housing, and C the upper structure in the shape of a platform which may be flooded. In the boller chamber D is a water-tube boiler E, supported on a platform secured in the pressure proof inner vessel A, this boiler being constructed for Oll fuel, the casing e of which is connected to a smoke-stack, which runs through the pressure proof inner vessel, the casing c however, not coming in direct contact with this inner vessel. The SHl0k6-St2ICk is composed of a. stationary lower part F and an upper part F which may be felled down about a hinge f during submarine travel.

The lower part F of the smoke-stack, which may be closed water-tight in known manner by a lid (not shown) during submarine travel, has double walls, the hollow chamber between them being connected through inlet and outlet piping G and H for cooling water. A pump K drives the cooling water through said hollow chamber in the direction of arrows 0a and y.

The cooled part F of the smoke-stack is extended a little into the pressure proof inner vessel A of the boat, so that the heat of the boiler casing 6 connected thereto, cannot be directly transmitted to the pressure proof imier vessel.

The advantage of the described device then obviously resides therein that a uniform temperature will be maintained in that part of the smoke-stack which reaches down into the pressure proof inner vessel A and which would become very hot during operation without the cooling and be suddenly very much cooled upon the flooding of the upper structure C. As .a consequence, a tight joint around this portion of the smoke-stack is now obtained.

The preservation of this tight joint between the smoke-stack and the pressure p, proof inner vessel, is still more favored thereby that no great amount of heat from the boiler casing e is transmitted directly to the pressure proof inner vessel, but is in stead transmitted to the downward extension of part F of the smoke-stack and from there to the cooling water.

We claim:

1. In a submarine boat having a steam boiler inclosed in a pressure proof inner vessel, a smoke-stack for the boiler, said smoke-stack being provided .With; double walls forming a cooling chamber extending into said vessel, and conduits for said chamber for circulating cooling'medium in said chamber.

2. In a. submarine boat having a steam boiler inclosed in a pressure proof inner vessel and supported by said vessel, a casing surrounding the boiler, said casing being suspended in such a manner that it does not come in direct contact with the walls of said vessel.

3. In a submarine boat having a steam boiler inclosed in a pressure proof inner vessel and supported by said vessel, a casing surrounding the boiler, a smoke-stack for the boiler, said smoke-stack penetrating said vessel and being provided with a downwardly projecting portion extending into said vessel and from which said casing is suspended in such a manner that it does not come in direct contact with the walls of said vessel.

4. In a submarine boat having a steam boiler inclosed in a pressure proof inner vessel and supported by said vessel, a casing surrounding the boiler, a smoke-stack for the boiler, said smoke-stack penetrating said vessel and being provided with a clown- Wardly projecting portion extending into said vessel and from which said casing is suspended in such a manner that it does not come in direct contact with the walls of said vessel; said downwardly projecting portion having double walls forming a cooling chamber, and conduits for said chamber for circulating cooling medium in said chamber.

5. In a submarine boat having a steam boiler inclosed in apressure proof inner vessel and supported by said vessel, a smokestack for the boiler, said smoke-stack penetrating said vessel and being provided with a downwardly projecting portion extending into said vessel, a casing surrounding the boiler so dimensioned and suspended from the said downwardly projecting portion of the smoke stack that the casing does not.

come in direct contact with the Walls of said vessel; said smoke-stack being secured by tight joints to said casing as well as to said vessel and the outer Walls of the boat.

6. In a submarine boat having a steam CONRAD REGENBOGEN. HANS TECHEL.

lVitnesses JULIUS RorKE, HERMANN SoHii'r'r.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

